Research on presence of viruses in broilers.

Summary In intensive poultry broilers infectious and contagious disease progresses more viral etiology. In the epidemiological situation of farms, the disease may evolve clinical or subclinical, is usually complicated by secondary bacterial infections. Also, the viruses that cause these diseases induced in broilers body, immunosuppressive conditions that adversely affect the immune response after vaccination against other diseases. Given those issues, research aimed presence of viruses in 10 broiler farms, samples were taken from cadavers aged between 15 and 35 days. The viruses were detected by polymerase chain reaction for DNA viruses by polymerase chain reaction with reverse transcriptase for RNA viruses. These two tests of molecular biology, viruses were detected following: avian reovirus (in 10 farms), infectious bronchitis virus (in 6 farms), infectious bursal disease virus (in 2 farms), chicken parvovirus (in 4 farms), nephritis virus infectious (in 2 farms), astrovirusul chicken (on a farm). Not identified viruses: rotavirus avian infectious, anemia virus to chickens and chickens proventricular necrosis virus. In broilers from intensive evolving infectious diseases endemic ribo or adenoviruses. These diseases can develop clinical or subclinical, being, frequently complicated by secondary bacterial infections. These viruses are accompanied by immunosuppressive conditions that may influence the immune response after vaccination or suggestive may favor the emergence of other infectious diseases (5, 6, 7). The emergence and evolution of these diseases in broiler flocks produce significant economic damage mortality through treatment costs through increased the specific consumption and reduced weight gains (5, 6, 7). Research has followed the presence of viruses in flocks of broilers, in 10 farms at different ages. Materials and methods The research was conducted in 10 farms of broilers in the west of the country throughout the year. Samples were taken from cadavers aged 14-35 days and were represented by fragments of lungs, proventriculus, small intestine, spleen and Bursa Fabricius.